[PATCH linux dev-4.7 2/4] drivers/fsi: Look for Hub sourced IRQs

[Eddie James]

On 04/07/2017 08:52 AM, Christopher Bostic wrote:
> In addition to looking for local device IRQs on the slave also
> check if the IRQ came from a hub source in the interrupt handler.
>
> Signed-off-by: Christopher Bostic <cbostic at linux.vnet.ibm.com>
> ---
>   drivers/fsi/fsi-core.c | 12 ++++++++++++
>   1 file changed, 12 insertions(+)
>
> diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c
> index 36dde94..45e1171 100644
> --- a/drivers/fsi/fsi-core.c
> +++ b/drivers/fsi/fsi-core.c
> @@ -98,6 +98,11 @@ static int fsi_slave_write(struct fsi_slave *slave, uint32_t addr,
>   #define FSI_SI1S		0x1C	/* R: IRQ status */
>
>   /*
> + * SI1S, SI1M fields
> + */
> +#define FSI_SI1_HUB_SRC		0x00100000	/* hub IRQ source */
> +
> +/*
>    * SMODE fields
>    */
>   #define	FSI_SMODE_WSC		0x80000000	/* Warm start done */
> @@ -793,6 +798,13 @@ static int __fsi_dev_irq(struct device *dev, void *data)
>   		return 1;
>   	}
>
> +	if (!(*si1s & FSI_SI1_HUB_SRC)) {
> +		dev_dbg(dev, "IRQ not from a hub source\n");
> +		return 0;
> +	}
> +
> +	/* TODO: handle hub sourced IRQ */
> +
>   	return 0;
>   }
>

Acked-by: Eddie James <eajames at linux.vnet.ibm.com>